Manufacture of nuts.



PATENTED 00:17. 16, 1906.

W. L. WARD.

MANUFAOTUR E OF NUTS.

APPLIUATION FILED MAY 16, 1905.

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(afar/26y PATENTED OCT. 16, 1906.

W. L. WARD.

S T U N F 0 PM R U T G A U U N A M APPLICATION FILED MAYlG, 1905.

2 SHEETSSHEET 2 ml 1 ME 12 10 Ylllllllllli I 17 ,(t/{TLV6TCZOYA 4 an. W \lul I didrrw UNITED STATES PATENT OFFICE.

WILLIAM L. WARD, 01? PORT CHESTER,- NEW YORK.

MANUFACTURE OF NUTS.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed May 18, 1905. Serial No. 260,683.

This invention relates to a method of manufacturing nuts whereby metal bars are transformed into the finished product by sequential operations that can be performed rapidly and without material waste, effecting economy in time and material.

The bars of metal to be manufactured into nuts are rolled or pressed into shapes, having the metal distributed so that they can be separated, shaped, drilled, and trimmed to final form with the utilization of. practically all of the metal of the bar, as distlnguished from a former scrap waste amountin commonly to thirty per cent. of the'material.

The nature and characteristic features of the invention will appear from the following description and the accompanying drawings in illustration thereof, of which- Figure 1 is a sectional'side view representing the rolling of a bar with crowned or arched faces and serrated edges suitable for making hexagonal nuts. Fig. 2 is a sectional end view of the bar and the rolls for crownin and serrating it. Fig. 3 is a sectional en view of the crowned bar and the rolls for fiattening the ridges or removing the fins formed by the rolling pass producing the crown. Fig. 4 is a plan view, and Fig. 5 is a sectional view, of a serrated bar whose crowns have the form of a longitudinal rid e, the edges of the serrations being concave Fig. 6 is a plan view, Fig. 7 is a sectional view, and Fig. 8 is a side view of abar having crowns of pyramidal form, the edges having the plain form used in making square nuts. Fi 8 is a plan view of a modlfied form of t e strip of blanks shown in Figs. 6 to 8-. Fi 9 is a sectional side view representing tlie sinking of a crowned bar by rolling-dies. Fi 10 is a sectional side view representing t e sinking of a crowned bar by reciprocating dies. Fig. 11 is a longitudinal sectional view, and Fig. 12 is a plan view, of a bar having the sinks formed in the crowned faces thereof. Fig. 13 is a sectional side elevation representing the nicking of the crowned faces of a bar by rolling-dies. Fig. 14 is a sectional side elevation re resenting the nicking of the crowned faces 0 a bar by reciprocating dies. Fig. 15

is a longitudinal sectional view, and Fig. 16 is a plan view, representing a bar having nicks and sinks formed therein. Fig. 17 is a side view representing an elevation of a nut-blank and a section of the dies for facing it. Fig.

18 is a sectional view of a sunken and faced nut-blank. Fig. 19 is a sectional side view illustratin the drilling of the blank shown in Fig; 18. i 20 is a sectional side view illustrating t e operation of trimming a nut, and Fi 21 is a perspective view of the finished b ank.

In practicing the invention, as illustrated .in Figs. 1 to 3, inclusive, 9. bar of steel 1 is passed through rolls 2, which form it with the rid e-like crowns or arches. 3 upon the faces an serrations or zigzags 4 upon the edges thereof, the bar being submitted to a second pass throu h rolls 5 to flatten the ribs or remove the s that may be formed in crownin lhe serrated and crowned bar, as shown in Figs. 4 and 5, may have the faces 4 of the serrated edges concaved to compensate for expansion by the sinking to be effected. The bar may also be brought to a form,-by rolling or otherwise, having the symmetrical pyramidal crowns or arches 6 on the faces with the depressions 6 between them, and straight edges, as illustrated in Fi s. 6, 7, and 8, or with the concavities 6 in t e edges, as shown in Fi 8, the edges bein preferably given such orm in any case as wi l expand to or a proximately to the form required for t e character of nut desired, whether square, hexagonal, or octagonal. The crowned bar may now be provided with the uniformly spaced sinks or indentations 7, centrally and symmetrically disposed, so that the several indentations in each face are approached by others in line therewith in the opposite face, being formed by rolling-dies 8, as shown in Fig. 9, or by reciprocatin dies 9, as shown in Fig. 10, a type of the pro not being shown in Figs. 11 an 12. It is advantageous, however, to subject the bar to an operation producing depressions or nicks 10 in opposite faces thereof in the respective planes or their final se aration, the operation being effected either y passing the crowned bar through the rolling-dies 11 or the reciprocating dies 12, forming such depressions or nicks at uniform intervals midway between the centers of the sinks in the planes of finally separating the blanks, and thus disposing the metal so that it will flow to effect the redistribution rec the tops thereof flare like the base of a bell.

To correct this condition and to bring the faces of the se arate blanks to the correct contour of the lank 13, the metal is redistributed-by subjecting them to pressure by the facing-diesv 14 and 15. The strip of blanks havin been separated and respectively faced, t e configurations shown in Fig. 15 are brought to that shown in Fig. 18, m

which the entrance to the sinks 16 is substantially the bore to be formed for taking the thread.

In sinking the crowned blanks the drift of the metal resultin in a flarin hole, as caused by the punc es 9 of the 'es 9, may be wholly or partly corrected by so constructing the dies that the faces 9 thereof will press the crowns and force the metal thereof against the punches in close sequence with the sinking o eration.

The faced lanks are then given the bore 17 by the .drill 18 and then forced by the, male die 19 through the female die 20 to trim them to the final form. (Shown in Fig. 21.)

It is to be understood that the order of operations described may be varied or they may be performed simultaneously, and certain of the operations may be omitted without destroymg the beneficial results of others, and

consequently the ri ht is-reserved, so far as ma be, to so vary t e mode of operation.

aving described my invention, I claim- 1. The method of manufacturing nuts which consists in crowning by pressure, sinkthe opposite faces of the ing and pressin 7 he nut-blanks, substantially metal forming t as specified.

2. The method of manufacturing nuts which consists in forging crowns, depressions and sinks in the faces of a bar of metal, thedepressions and sinks alternating at uniformly spaced points, redistributing the metal by ressing the resulting blanks and forming t e bores of said blanks, substanf 4. The method; of manufacturing nuts which consists in concaving -the edges of a bar of metal and sinking and pressin the faces of said bar, substantially as speci ed.

In testimony whereof I have hereunto set my hand, this 12th day of May, 1905, in the presence of the subscribing witnesses.-

WILLIAM L. WARD.

In presence of R. J. SNYDER, JOSEPH HAIGHT. 

